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CN-122000381-A - Integrated hydrogen circulation pump cover plate, fuel cell hydrogen integrated supply system and method

CN122000381ACN 122000381 ACN122000381 ACN 122000381ACN-122000381-A

Abstract

The invention relates to an integrated hydrogen circulation pump cover plate, a fuel cell hydrogen integrated supply system and a method. The novel hydrogen supply module comprises a cover plate body, a novel hydrogen supply module shell, a novel hydrogen inlet connector mounting valve seat, a hydrogen isolation valve mounting valve seat, a hydrogen proportional valve mounting valve seat and a novel hydrogen inlet channel, wherein the novel hydrogen inlet connector mounting valve seat is integrally arranged on the cover plate body and used for mounting a novel hydrogen inlet connector, the novel hydrogen inlet channel is used for guiding novel hydrogen to the ejector mixing section, and the novel hydrogen inlet channel is provided with a novel hydrogen inlet nozzle. The space utilization rate is improved, the energy loss is reduced, and the efficient hydrogen circulation supply is realized.

Inventors

  • ZHANG XIANGYU
  • ZHU YESHENG

Assignees

  • 无锡威孚高科技集团股份有限公司

Dates

Publication Date
20260508
Application Date
20260122

Claims (10)

  1. 1. An integrated hydrogen circulation pump cover plate, comprising: A cover plate body; The hydrogen circulation module (2) comprises a hydrogen check valve module (5), a hydrogen circulation pump inlet (201), a hydrogen circulation pump outlet (202), an ejector backflow air inlet (203), an ejector mixing section (204), an ejector diffusion section (205), a backflow inlet joint (1) communicated with the hydrogen circulation pump inlet (201) and a backflow outlet joint (4) communicated with the ejector diffusion section (205), which are integrally arranged on the cover plate body, wherein pump mounting surfaces for mounting a Roots type hydrogen circulation pump (8) are formed at the positions of the hydrogen circulation pump inlet (201) and the hydrogen circulation pump outlet (202); The new hydrogen supply module shell (3) comprises a new hydrogen inlet connector mounting valve seat (301) which is integrally arranged on the cover plate body and used for mounting a new hydrogen inlet connector (9), a hydrogen isolation valve mounting valve seat (302) which is used for mounting a hydrogen isolation valve (10), a hydrogen proportional valve mounting valve seat (303) which is used for mounting a hydrogen proportional valve (11) and a new hydrogen inlet runner (304) which is used for guiding new hydrogen to the ejector mixing section (204), wherein a new hydrogen inlet nozzle (6) is arranged at the new hydrogen inlet runner (304); When the Roots type hydrogen circulating pump (8) works, the reflux hydrogen enters the Roots type hydrogen circulating pump (8) from the hydrogen circulating pump inlet (201), is pressurized to the hydrogen circulating pump outlet (202), is injected to the injector mixing section (204) and the diffusion section by the high-pressure hydrogen of the new hydrogen inlet nozzle (6) through the injector reflux inlet (203), and finally returns to the electric pile inlet from the reflux outlet connector (4), and when the Roots type hydrogen circulating pump (8) does not work, the hydrogen which is not completely reacted at the electric pile anode outlet flows back to the injector through the hydrogen one-way valve module (5).
  2. 2. An integrated hydrogen circulation pump cover plate according to claim 1, characterized in that the return inlet connection (1) and the return outlet connection (4) are arranged on the same mounting surface on one side of the cover plate body, and the axes of the two are parallel.
  3. 3. An integrated hydrogen circulation pump cover plate according to claim 2, characterized in that the new hydrogen supply module housing (3) is formed by integral casting and is arranged on both sides of the cover plate body opposite to the return inlet connection (1) or the return outlet connection (4).
  4. 4. The integrated hydrogen circulation pump cover plate according to claim 1, wherein the new hydrogen inlet joint mounting valve seat (301), the hydrogen isolation valve mounting valve seat (302) and the hydrogen proportional valve mounting valve seat (303) are linearly arranged along the same outer side surface of the cover plate body.
  5. 5. An integrated hydrogen circulation pump cover plate according to claim 1, characterized in that an outlet flow passage extending in radial direction is provided at the hydrogen circulation pump outlet (202) to reduce gas noise generated when the compression rotor of the roots-type hydrogen circulation pump (8) pressurizes the return hydrogen, and simultaneously to store liquid water in the compression chamber.
  6. 6. The integrated hydrogen circulation pump cover plate according to claim 1, wherein a new hydrogen injection hole is processed at the junction of the new hydrogen supply module shell (3) and the hydrogen circulation module (2), the new hydrogen inlet nozzle (6) is installed at the tail end of the new hydrogen inlet runner (304) and penetrates through the new hydrogen injection hole, and then extends into the ejector mixing section (204), and the nozzle axis of the new hydrogen inlet nozzle (6) is arranged along the axial direction of the ejector mixing section (204).
  7. 7. The integrated hydrogen circulation pump cover plate according to claim 5, wherein the new hydrogen supply module housing (3) is provided with a water collecting cavity at one side of the new hydrogen inlet channel (304), a threaded hole is formed in the outer side of the water collecting cavity, and a drain plug (7) is detachably mounted in the threaded hole.
  8. 8. The integrated hydrogen circulation pump cover plate according to claim 1, wherein the hydrogen check valve module (5) comprises a hydrogen check valve seat (501), a hydrogen check valve housing (502), a hydrogen check valve core (505), a hydrogen sealing gasket (506), a spring (503) and a pressure regulating gasket (504); The hydrogen unidirectional valve seat (501) and the hydrogen unidirectional valve housing (502) are fastened through threads, a hydrogen sealing gasket (506) is arranged at one end, close to the hydrogen unidirectional valve seat (501), of the hydrogen unidirectional valve core (505), two ends of the spring (503) respectively prop against the pressure regulating gasket (504) and the hydrogen unidirectional valve core (505), so that the hydrogen unidirectional valve core (505) and the hydrogen sealing gasket (506) are tightly attached to the hydrogen unidirectional valve seat (501), and the pressure regulating gasket (504) is used for regulating the elastic force of the spring (503).
  9. 9. A hydrogen integrated supply system of a fuel cell, which is characterized by comprising a Roots type hydrogen circulating pump (8), a new hydrogen inlet joint (9), a hydrogen isolation valve (10), a hydrogen proportional valve (11) and an integrated hydrogen circulating pump cover plate according to any one of claims 1-8; The Roots type hydrogen circulating pump (8) is arranged on the pump mounting surface of the cover plate body, and the air inlet and the air outlet of the Roots type hydrogen circulating pump are respectively in gas communication with the hydrogen circulating pump inlet (201) and the hydrogen circulating pump outlet (202); The novel hydrogen inlet connector (9), the hydrogen isolation valve (10) and the hydrogen proportional valve (11) are correspondingly arranged on the novel hydrogen inlet connector mounting valve seat (301), the hydrogen isolation valve mounting valve seat (302) and the hydrogen proportional valve mounting valve seat (303).
  10. 10. A hydrogen circulation supply method, characterized by being based on the fuel cell hydrogen integrated supply system according to claim 9, comprising: When the fuel cell works, the reflux hydrogen from the anode outlet of the fuel cell enters a reflux inlet joint (1) through an external pipeline, sequentially enters a hydrogen circulating pump inlet (201) and a Roots type hydrogen circulating pump (8) through a flow channel in the cover plate body, is pressurized by the Roots type hydrogen circulating pump (8), and flows from a hydrogen circulating pump outlet (202) to an ejector reflux air inlet (203) through an outlet expansion cavity; Simultaneously, high-pressure new hydrogen of a high-pressure hydrogen storage bottle is guided into a new hydrogen inlet runner (304) through a new hydrogen inlet joint (9), a new hydrogen inlet joint (9) arranged on a new hydrogen inlet joint mounting valve seat (301), a hydrogen isolation valve (10) arranged on a hydrogen isolation valve mounting valve seat (302) and a hydrogen proportional valve (11) arranged on a hydrogen proportional valve mounting valve seat (303) in sequence, is sprayed into an ejector mixing section (204) through a new hydrogen inlet nozzle (6), is mixed with backflow hydrogen entering from an ejector backflow air inlet (203), and is then diffused and pressurized in an ejector diffusion section (205), and finally is returned to the anode inlet of the fuel cell through a backflow outlet joint (4); When the Roots type hydrogen circulating pump (8) does not work, the hydrogen which is not completely reacted at the anode outlet of the electric pile flows back to the ejector through the hydrogen one-way valve module (5).

Description

Integrated hydrogen circulation pump cover plate, fuel cell hydrogen integrated supply system and method Technical Field The invention relates to the technical field of hydrogen fuel cells, in particular to an integrated hydrogen circulating pump cover plate, a fuel cell hydrogen integrated supply system and a method. Background The hydrogen fuel cell system mainly comprises a hydrogen supply system, an air supply system, a hydrothermal management module, an electric control module, a galvanic pile module and the like. The hydrogen supply system mainly has the function of guiding wet hydrogen which is not completely reacted at the anode outlet of the electric pile and new hydrogen of the high-pressure hydrogen storage bottle to the electric pile inlet through parts such as a hydrogen isolation valve, a hydrogen proportional valve, an ejector, a hydrogen circulating pump, a hydrogen one-way valve and the like, so that the hydrogen utilization efficiency is improved. However, in the existing hydrogen supply system, each part is relatively independent, the integration level is low, pipelines are required to be used for connecting each part, the installation is complex, the space occupancy rate is large, the energy loss of hydrogen in a loop is increased, and the hydrogen utilization efficiency is reduced. Disclosure of Invention Therefore, the invention provides an integrated hydrogen circulation pump cover plate, a fuel cell hydrogen integrated supply system and a method, wherein an ejector, a hydrogen one-way valve and a Roots type hydrogen circulation pump cover plate are integrated into a whole, and a new hydrogen inlet connector, a hydrogen isolation valve and a hydrogen proportional valve can be further integrated and installed on the cover plate, so that the pipeline arrangement of the hydrogen supply system is greatly simplified, the space utilization rate is improved, the energy consumption is reduced, and the efficient hydrogen circulation supply is realized. Under the high working condition of the system, the hydrogen can flow back to the ejector through the hydrogen one-way valve, the hydrogen circulating pump is stopped and does not work, the service condition of the hydrogen pump is optimized, and the service life is prolonged. In order to solve the above technical problems, the present invention provides an integrated hydrogen circulation pump cover plate, comprising: A cover plate body; The hydrogen circulation module comprises a hydrogen one-way valve module, a hydrogen circulation pump inlet, a hydrogen circulation pump outlet, an ejector backflow air inlet, an ejector mixing section, an ejector diffusion section, a backflow inlet joint communicated with the hydrogen circulation pump inlet and a backflow outlet joint communicated with the ejector diffusion section which are integrally arranged on the cover plate body, wherein the cover plate body is provided with a pump mounting surface for mounting a Roots type hydrogen circulation pump at the positions of the hydrogen circulation pump inlet and the hydrogen circulation pump outlet; The new hydrogen supply module shell comprises a new hydrogen inlet connector mounting valve seat, a hydrogen isolation valve mounting valve seat, a hydrogen proportional valve mounting valve seat and a new hydrogen inlet runner, wherein the new hydrogen inlet connector mounting valve seat is integrally arranged on the cover plate body and used for mounting a new hydrogen inlet connector, the hydrogen isolation valve mounting valve seat is used for mounting a hydrogen isolation valve, the hydrogen proportional valve mounting valve seat is used for mounting a hydrogen proportional valve, and the new hydrogen inlet runner is used for guiding new hydrogen to the ejector mixing section, and a new hydrogen inlet nozzle is arranged at the new hydrogen inlet runner; When the Roots type hydrogen circulating pump works, the reflux hydrogen enters the Roots type hydrogen circulating pump from the inlet of the hydrogen circulating pump, is pressurized to the outlet of the hydrogen circulating pump, is injected to the ejector mixing section and the diffusion section by the high-pressure hydrogen of the new hydrogen inlet nozzle through the reflux air inlet of the ejector, and finally returns to the electric pile inlet from the reflux outlet connector, and when the Roots type hydrogen circulating pump does not work, the hydrogen which is not completely reacted at the outlet of the electric pile anode flows back to the ejector through the hydrogen one-way valve module. In one embodiment of the invention, the return inlet connector and the return outlet connector are arranged on the same mounting surface on one side of the cover plate body, and the axes of the two connectors are parallel. In one embodiment of the present invention, the new hydrogen supply module housing is formed by integral casting and is disposed on both sides of the cover plate body opposite to the return in